Close to a star-sized black hole, gravity changes so sharply over a few metres that your feet would be pulled far harder than your head. Your body would be stretched lengthwise and squeezed sideways, which astronomers genuinely call 'spaghettification'. Oddly, near a giant black hole you could cross the horizon without feeling anything special.
A large share of Earth's water molecules formed in the interstellar cloud that existed before the Sun was even born, more than 4.6 billion years ago. You are literally drinking a cosmic fossil.
By day, the Martian sky looks butterscotch because of fine dust hanging in the air. But at dusk, those same grains scatter blue light forward, creating a bluish glow around the Sun. Rovers have photographed these blue sunsets: the exact reverse of what we see on Earth.